from time import sleep
import threading

def sing(msg):
    while True:
        print(msg)
        sleep(1)

def dance(msg):
    while True:
        print(msg)
        sleep(1)

if __name__ == '__main__':
    threading.Thread(target=sing, kwargs={'msg': 'I sing'}).start()
    threading.Thread(target=dance, args=('I dancing', )).start()
